Sorry this is an out-of-order reply to the very patient folks that were waiting for a long time, but I had to solve this mystery.

This is called a Rogue body shape on the work order, and the model is an RXB5 (Rogue eXtra long scale Bass 5). The serial number does in fact have a "G" as the identifier originally.

I know we had a previous model for Japan that had an "R" as the model code, so I guess we decided to change to a letter we hadn't used before and started using "Q" later. I'm not sure why this Rogue has a "G" in the serial number, but it's legit.